If you're traveling later this week for Thanksgiving: drive (or fly) safely, and bring your own soap. If you're staying in a hotel, that is. It's easy to avoid the plastic- or paper-wrapped bar by the sink if you spend two minutes at home prepping your own.
Here's how I do it: I cut a small block off a bar of soap (purchased package-free), then pop it in a little tin to travel with. Last year I bit the bullet and bought a soap tin from Lush that was just the right size and shape, but I imagine you could use anything to hold the soap sliver: a plastic container, an Altoids tin, a small container from your kitchen, a small glass jar. The soap block should be big enough to last you awhile, but not so big that it adds significant bulk to your travel kit. I find that a one-inch square seems to be just right, but if you're packing for a family, you might want it to be a bit larger.
There are many ways that staying zero waste while traveling can be complicated and challenging: finding places to compost, navigating airport meals, all the unexpected things that can crop up. But avoiding overly packaged hotel soaps? It's an easy one.
More travel tips if you need them, right this way.